[dpdk-stable] patch 'net/ena: fix SIGFPE with 0 Rx queue' has been queued to stable release 18.05.1

[Christian Ehrhardt]

Hi,

FYI, your patch has been queued to stable release 18.05.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 08/01/18. So please
shout if anyone has objections.

Thanks.

Christian Ehrhardt <christian.ehrhardt at canonical.com>

---
>From ca555cb5281b400f86c51d420a85012039ec19bf Mon Sep 17 00:00:00 2001
From: Daria Kolistratova <daria.kolistratova at intel.com>
Date: Tue, 26 Jun 2018 18:38:56 +0100
Subject: [PATCH] net/ena: fix SIGFPE with 0 Rx queue

[ upstream commit 361913ad6f8c05fc541fe4bfdae3b0dc095ae3af ]

When the number of rx queues is 0 (what can be when application does
not receive) failed with SIGFPE.
It happens when the application is also requesting ETH_MQ_RX_RSS_FLAG
in the rte_dev->data->dev_conf.rxmode.mq_mode.
Fixed adding zero rx queues check.

Signed-off-by: Daria Kolistratova <daria.kolistratova at intel.com>
Acked-by: Michal Krawczyk <mk at semihalf.com>
---
 drivers/net/ena/ena_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index f10bee236..ebc911168 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -924,7 +924,7 @@ static int ena_start(struct rte_eth_dev *dev)
 		return rc;
 
 	if (adapter->rte_dev->data->dev_conf.rxmode.mq_mode &
-	    ETH_MQ_RX_RSS_FLAG) {
+	    ETH_MQ_RX_RSS_FLAG && adapter->rte_dev->data->nb_rx_queues > 0) {
 		rc = ena_rss_init_default(adapter);
 		if (rc)
 			return rc;
-- 
2.17.1